Title (fr)

Publication

Application

Priority

JP 16925198 A 19980602

JP 4956599 A 19990226

Abstract (en)

There are provided a liquid crystalline compound having a large negative DELTA epsilon , low viscosity, a large K33/K11 value, a small DELTA epsilon / epsilon ORTHOGONAL and mutually excellent solubility even at extremely low temperature; a liquid crystal composition prepared from a liquid crystalline compound; and a liquid crystal display device fabricated from such a liquid crystal composition. The liquid crystalline compound of the present invention is a liquid crystalline compound represented by the following general formula (1): <CHEM> where, R<1> represents hydrogen, fluorine, an alkyl group having 1 to 15 carbon atoms, or an alkenyl group having 2 to 15 carbon atoms; each of rings A<1>, A<2>, and A<3> independently represents trans-1,4-cyclohexylene group, 1,4-cyclohexenylene group, trans-1,4-silacyclohexylene group, 1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, pyrimidine-2,5-diyl group, pyridine-2,5-diyl group, 1,3-dioxane-2,5-diyl group, tetrahydropyrane-2,5-diyl group, 1,3-dithiane-2,5-diyl group, or tetrahydrothiopyrane-2,5-diyl group; X<1> represents hydrogen or fluorine; Y<1> represents hydrogen or an alkyl group having 1 to 15 carbon atoms; 1 represents an integer from 1 to 10; and each of m and n independently represents 0 or 1.